As of July 2026 · 23 listings tracked across Amazon, Walmart & eBay
Right now the best value is 13¢ per oz — Duke’s Real Mayonnaise Jar – Original Smooth & Creamy Taste, 64 Ounce… (64 oz, $8.48) on Amazon. See it on Amazon →(paid link)
Prices change fast and stock disappears faster — YMMV.
Median across all 23 tracked listings: 28¢ per oz. The worst deal we saw ran 94¢ per oz — same product category, 7.1× the price per unit.
The 12-month picture
This is our first month of tracked history for Mayonnaise — the trend line starts here.
Lowest we've ever tracked: 13¢ per oz (July 2026).
How we figure this out
Once a month we pull live Mayonnaise listings from Amazon, Walmart and eBay, read the honest quantity out of each one (ozs, in this case — the unit that actually matters), and divide the real price by it. Coupons that change what you'd pay today are applied; "subscribe & save" teasers are not. Then everything gets ranked by cost per oz, because a big box with a small number inside is still a small number.